Stop mechanism



Am H, M23 KASL-Hfi A. R. HAVENER STOP MECHANISM Filed May 5, 1921 5Sheets-Sheet 1 Y i l I l I I Am. 17, W23.

A. R HAVENER STOP MECHANI SM 1921 5 Sheets-Sheet 2 Filed May 1 A. R.HAVENER STOP MECHANISM Filed May 5, 1921 x 5 Sheets- 3 f I Q v I I P1::1

Apr. 17, 1923.

A. HAVENER STOP MECHANISM Filed May 5, 1921 5 Sheets-Sheet 4 clues M4ARTHUR H. HAVENER, OF WELYLAND, MASSACHUSETTS, ASSIGNOE T AIVIERICANLACING. HOOK (30-, A CORPORATION OF NEW JERSEY.

STOP MECHANISM.

T0 0/]. whom it may canoe/m.

Be it known that l, i -ARTHUR R. lhvnnnn,

a citizen of the United States, residing at ll aylainl. in the county ofMiddlesex and State of lvlas sachusetts, have invented new and usefulImprovements in Stop Mechanism, of which the following is aspecification.

This invention relates to an improved stop mechanism, the object of theinvention being to provide a mechanism which will automatically stop amachine at the end of a predetermined number of rotations of the driving shaft of the machine, or at the end of a predetermined number ofsequences of operations of said machine.

The invention is particularly adapted to he used. in connection withlacing hook setting machines for boots and shoes and has 20 been beenshown and described in my application filed November 23, 1918, SerialNo. assess patented May 2-1, 1921, No. 1,379,303 for lacingstud settingmachine with automatic stop. the subject-matter of this case beingdivided out of said application.

The invention consists in the combination and arrangement of parts setforth in the following specification and particularly pointed out in theclaims thereof.

Referring to the drawings:

Figure l a right hand side elevation of a machine embodying myinvention.

Fig. .2 a detail plan partly in section taken on line 22 of Figure 1,illustrating tlic mechanism connecting with the clutch to automaticallystop the machine.

Fig. 3 is a detail section taken on line 33 of Figure 1.

Fig. -1- is a detail section partly in elevation taken on the line l4v.of Figure 2.

Figs. 5 and 6 are detail sectional plan views taken on line 6-6 of Fig.4.

Fig. 7 is a. side elevation partly broken away and shown in sectionillustrating a portion of the mechanism which operates the clutch toautomatically stop the machine.

Fig. 8 is a transverse section taken on the line 8-8 of Fig. '7 lookingtoward the right in said figure and presenting a rear elevation of theparts illustrated in 7.

Fig. 9 is a sectional elevation taken on line. 88 of Fig. 7 lookingtoward the left in said figure.

Fig. 10 is a detail plan. view partly in seo- Divided and thisapplication filed May 0 tion of a portion of the mechanism for operatingthe clutch mechanism.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, is the frame of the machine and 21 the main driving camshaft which is driven by means of a clutch 19. said clutch comprising aclutch pulley 22, constituting a driving member. which rotates looselyupon the driving shaft 21 until locked by a locking dog 2-1 to a clutchmember 23 which is fast to said shaft 21 and constitutes a drivenmember. The clutch 19 is operated to start the machine by a rod 25connected to a suitable treadle (not shown in the drawings), saidtreadle being moved to lower the rod 25 and thereby rock a lever 2-6pivoted at 27 to the frame of the machine and, through an arm 28 and pin29. operates a spring actuated tripper slide 530 which, when withdrawnfrom in front of the locking dog 24, will allow said locking dog toengage the driving pulley 22. whereupon said driving member 22 and saiddriven member 23 will be locked together in a manner well known to thoseskilled in this art. It will be seen that the pin 29 forms. in effect, aportion of the tripper slide 30. The novel features of this inventionwhereby the driving member 22 and driven member 23 are automaticallydisengaged to stop the machine will be hereinafter fully described.

The member constitutes a portion of a work support and is screwed to theframe 20. zit. presscr foot -8 is adapted to be raised by foot powerfrom the treadle, or automaticallv by power from the main driving shaft.When the rod 25 is pushed upwardly it rocks an arm 39, Fig. 8, which isfastened to a rock-shaft 40. The rock-shaft is journalled to rock inbearings 41 on the right hand side of the frame (see Figure 1).

i istably fastened to the front end of the r ck-shaft if) an arm 42, thefree end of which bears against the bottom of a rod 4:3 adapted to slidevertically in bearings 4: on the right hand side of the frame 20. Thepresser foot 38 is adjustahly fastened to the rod 518 by a screw 15. Aspring 46 presses the rod downwardly.

rock shaft 61 is journalled to rock in liiearings 62 in the frame 20. Arocking motion is imparted to the shaft 61 by means of a link 67pivotally connected at its upper end to an arm 68 fast to the shaft 61,and pivotally connected at its lower end to a cam lever 69 which isrocked upwardly and downwardly by cams 70 and 71 which are fast to themain shaft 21.

A lever 119 is pivoted upon a vertical stud 120 which is mounted in thepresser foot 68 and f rocked upon said stud 120 by motion transmitted bya rod 121 connected to a bell crank lever 122 pivoted at 123 to abracket 12% fast to the frame 20. The connecting; rod 121 is constructedin two sec tions 125 and 126 which are adapted to be adiusted relativelyto each other to 1ncrcase or diminish the length of the rodby means of aturn buckle 127 and cooperating lock nuts 128. The rod 121 is connectedat one end to the lever 119 by means of a clampinn member 129 having arecess 130 adapted to fit the spherical head 131 of a pm 132 fast to thelever 11.9, and the other end of said rod is similarly fastened to thebell crank lever 122 by the clamping member 133 having a recess 13 1which the spherical head 185 of a pin 136 which is fastened in an arm137 of said bell crank lever 122.

It will thus be seen that the rod 121 makes a universal connectionbetween the levers 119 and 122 to allow for the horizontal movement ofsaid levers and for the vertical movement of the presser foot 38. Theother arm 188 of the lever 122 has journaled thereon a cam roll 139which. engages a cam 1 fast to the link 67. The upper portion of the cam1 10 is cylindrical, while the lower portion 141 is substantiallyconical, see Fig. 7.

is spring 1 12 keeps the roll 139 in engagement with either the cam 1 10or the link 67. Thus it will be seen that with each downward movement ofthe link 67 the cam 1 10 will descend and the cam roll 189, which hasbeen engaging said linlr 67, as illustrated in Fig. 2, will engage thesubstantially conical portion 111 of the cam 1 16 and cause the lever122 to reel; in the direction of the arrow a, Fig. 2, and thus throughthe mechanism just described cause the lever 119 to rock on its pivot120.

vReferringto Figs. 2, l, 5, 6 and 10, it,

will be seen that the lever 119 is adapted to be rocked upon the stud120, as previousl described, and has formed integral thcrer an arm 161.This arm 1.61 has fast therein the pin 132 previously referred to, saidpin having a portion 162 extending downwardly into a pawl 1641 which hasprojecting therefrom a pin 165 which is engaged by a lever 163 pivotedupon the portion 162 of the pin 132.

A spring 166 connected to the lever 163 always tends to keep said leverin engagement with the pin 165. The pawl 164 has acylindrical stem 167projecting; from its lower side which. has a reduced portion 168 formedtherein which is adapted to fit and slide in a. slot 169 formed in aplate 179 mounted on a block 171 upon the plate forming a part of thework support The slot 169 is formed concentric with the center of thestud 126 and the pawl 16 1 is moved forward and backward upon the plate170 by the rocln movement of the lever 119. The pawl 16d is preventedfrom moving vertically upon the plate 170 by shoulders 172 and 1???formed by the reduced pori' of the stem 167.

ll foot together .nen the pre with the mechanism mounted thereon, israised the pawl 161; will remain stationary, the portion 162 of the pin132 slidingvertically therein as illustrated in Fig. 1. V The pawlengages the teeth 17% of a ratchet 175, and the spring 166, pulling uponthe lever 163 which, in turn, is engaging the pin 165, normally tents tokeep the pawl 16 1 in engagement with the teeth 17%. The ratchet 175 isfast to the stud 120 and has a series of holes 1, 2, 3, and 41 thereinarranged concentric with the center of said stud.

A setting: pm 177 may be placed in any one of said holes and a coilspring 178 fast end to the frame 20 and at the other end to a pininserted in the periphery of the ratchet normally tends to pull theattiug pin 1T7 toward and against a stop formed the side of the presserfoot Loosely mounted upon the stud 126 is a atch 193 normally held inthe position illusted in Fig 2 by a coil spring 19 1 which fast at oneend to the frame 20 and at the other end to an arm 195 formed on saidlatch. The latch 193 also has an arm 196 with a notch 197 in its outerend. A pin 198, projecting upwardly from the ratchet 175, adapted toengage the arm 196 at certain times in the operation of the mechanismand rotate said latch upon the stud 120. V

A locking pawl 199 is pivoted at 200 upon the blogk 171 and is adaptedto engage the teeth 17 1- of the ratchet 175. A fiat sprins; 201normally holds the pawl 199 against stop pm 202 and in engagement withthe teeth 17% to hold the ratchet 175 against rotation thereof by thespring 178, while the pawl 164 is moving backward to engage anothertooth.

Before starting the machine the operator inserts the pin 177 in one ofthe holes 1, 2, 3 or 1 in the ratchet 175, for example, if he desires tohave the cam shaft rotate six times before it automatically stops, heplaces the pin 177 in the hole 1. If he desires to have said shaftrotate five times before stopping he places the pin in the hole 2. If hedesires to have the shaft rotate four times, he places the pin in thehole 3 and if he desires to have the shaft rotate three times, he placesthe pin in the hole 4:.

In the drawings, see Fig. 2, the pin is placed in the hole 1 and is heldagainst the side oi the presser foot 38 by the spring 178.

Pie'tcrring now to Figs. 1. 2, 5. and 6. it will be seen that a rod 205is mounted upon ne 21) and is slidable horizontally in i The rod itsfront lilownwardly at 208 in order e engaged by the arm 195 of the tieproper time, and thereby from the position illustrated in o to thatillustrated in Fig. 6. The

end of the rod 205 is connected by a. pin 209 to an arm 210 fast to aroclr shaft 211 mounted in bearings 212 at the r of the machine. serondarm is fastened to the rockalt 211 and has pivoted thereto at 214 thedownwardly extending arm 28 previously referred to. The arm 28 its lowerfree end is adapted to be interposed between an. upwardly extending arm21'? o1" the leve 26 and the pin 29 forming a part of the do 30 and whenso interposed it will be seen that the lower portion of said arm 28constitutes a connecting member between the manually operatedactuatingmember 26 and the tripper slide Another arm 218 of the lever 26is engaged by an extension 219 on the arm 89, against which it isnormally held by a spring 220 except when the d 253 and arm 89 areraised to lift the pr or foot 38, at which time the movement oi thelever 26 will be limited by the arm 218 engaging the end of a slot 221through which said arm projects.

spring 222 normally tends to hold the arm in engagement with the arm217, as illustrated in Fig. 7. at which time the end 209 of the rod 205will be in the position illustrated in 2 end A spring plate 22 pivotedat 22%- upon the inside the frame 20. has last thereto stud 22:3 whichprojo;ts through an opening 226 in the frame 20. said stud havingmounted reou a spring 227 which bears at one end ainst the frame and theother end "est an adjusting nut 228 upon said stud. velie spring plateat lower end, lie-ire against one end of the tripner slide and alwaystends to push said tripper slide toward the left. Fig. 7. and into aposition to engage the locking; dog 24;. thereby stoppin the machine.The pin 29 fast slide 30. projects through an op ning: ii the trame 20and engages the lower end of the swing n arm 28. stop pin 229 limits themoi tent of the arm and the tripper slide toward the left 7, whilecontact of the arm with the twine at limits the movement of said arm andslide toward the right.

The general operation of the mechanism hereinbetoro described is asiollows: Aseu t'li the parts otthe lutch controlling mechanism to be inthe relative positions illustrated in Fig. 7 and the operator wishes tothrow the clutch into operation, he rocks the treadle in the properdirection to lower the rod 25 and thereby rocks the lever 26 and arm 28whereupon the tripper slide Bill will be withdrawn from in front of thelocking dog 24 allowing said locking dog to engage the criving pulley 22and start the machine.

During the operation of the machine, the link 67 will be moved upwardlyby the cam lever 69 and cam 70 and this will cause the lever 122 to rockin the reverse direction to that indicated by the arrow a, Fig. 2 andthereby through the connecting rod 121, le-

119 and pawl 16 the ratchet 17 will be moved forward one tooth.

The cycle of operations is then repeated and with each successiverocking. movement or". the lever 119, the pawl 16%- will feed theratchet 175 forward one tooth and the look ing' pawl 199 will hold saidratchet in its advanced. position against the tension of the spring 178while the pawl 164.- is returning to engage a new tooth.

is the ratchet 175 thus rotated, step by step, it will eventually arriveat the position illustrated in Fig. 5 and the latch 193 will be movedfrom the position illustrated in Fig. 2 to that illustrated in Fig. 5 bythe pin 198. which being; fastened to the ratchet 175 will be carried bysaid ratchet into engagement with said latch and thus said latch will bemoved to the position illus trated in 5.

In the position illustrated in 5 it will be seen th the ratchet is heldagainst rotation by the locking pawl 199. The pr 164i will now be movedbackwardly until the end thereof e a 'es the latch which will. operateto th 1 said. pawl out or" e ment with he ratchet; then upon the nextforward movement. of the pawl 16- said latch will be moved to theposition illustrated in 6.

The pawl 16% will now engage the pawl 199 and throw it out of enp a'ement with the ratchet 175 and said ratchet will then be carried backby the spring); 1' 8 from the position illustrated in Fig. 5 to thatillustrated in Fig. 6 and will be stooped by the pin 17 coming incontact with the side of the presser toot 38.

During the latter part of the last tor-- ward movement of the pawl 16%which carries the latch 193 from the position illustrated in 5 to thatillustrated in Fig. (3., the arm will en the downwardly turned end 208of the 1 ed 205 and move said rod in the direction or" the arrow 0, Fig.2, thereby rocking the wait 211 and lzllSlIlQ' the nrm 28. This upwardmovement of the arm 28 will discng'z go the lower end of said arm fromthe arm 21? of thelever 26 thereby to lltl operator rer. foot from thetree The operator n top the IT" chine if is so desires at t L each rot"tion of the shaft by removing fool om tltreadle, which will cause therod 2-) to rise and there 'iy allow the parts to assume the relativeposi ions illustrated in Fig. '7.

The machine having stopped the operator new and raises t1 presser foot38 u 3i icient distance to disengage the latch from the pawl 16whereupon the pawls 164- and 199 will return to the positionsillustrated in Fig. 2 and the machine now ready for a new sequence ofoperations.

It will thus be seen that by means of the mechanisms hereinbeforedescribed that predetermined number of rotations of the main shaft ofthe machine or a redeten mined number of sequence of oper the mechanismsembodied in a machine may be obtained and the machine automaticallystopped at the completion of the predetermined number of rotations orsequences.

If desired, the mechanism hereinbefore de scribed can be operated tostop the machine at the end of each rotation of the shaft and this maybe done operating the treadle to depress the rod 25 and thus operate thelever 26 and through the connecting; member 28 and pin 29 the tripperslide 30 will be moved out of engagement with the locking dog; at andthe clutch will then operate the machine to rotate the shaft and actuatethe methanisms operated by said shaft. The operator releases the treadlebefore the completion of one rotation, whereupon the rod 25 will moveupwardly and the lever 26 being thus released the tripper slide will betoward the left, Fig. 7, by the spring been automatic all y moved 228until it is engaged by the dog 2 whereupon the driving men'iloer 22 ofthe clutch will be disengaged by the driven member 23 and the machinewill be stopper.

I claim:

1. A stop mechanism having, in combination, a rotary shaft, a clutch onsaid shaft, a spring actuated tripper adapted to engage said clutch andunlock the driving member thereof from said shaft, means to move saidtripper out of engagement with said clutch comprising a manuallyoperable actuating member and a connecting; member adapted to beinterposed between said actuating member and said tripper and meansactuated by said shaft to automatically move said connecting member outfrom between said actuating member and said tripper whereby said tripperat the end of a predetermined plurality of rotations of said shaft maybe released and allowed to engage said clutch to unlocl: the drivingmember from the driven member of said clutch and stop said machine.

2. A stop mechanism having, in combination, rotary shaft, clutch on saidshaft, a spring actuated tripper adapted to engage sa i clutch andunlock the driving member thereof from said shaft, means to move saidtripper out of engagement with said clutch comprising a manuallyoperated actuating member, a pivotall mounted arm, the free end of sa larm adapted to be interposed between. said actuating member and saidtripper an means actuated by said rotary shaft to automatically movesaid arm out from between said actuating member and said tripper at theend of a predetermined plurality of rotations of said shaft, wherebysaid tripper may be released and allowed to engage said clutch to unlockit from said shaft and stop said machine.

3. A stop mechanism having, in combination, a shaft, a clutch pulleyrotatably mounted on said shaft and constituting a driving; member, adriven member; fast to said shaft, a locking dog pivoted to said drivenmember and adapted to engage said driving" member, a tripper slidenormally adapted to engage said. locking dog to disensaid dog; from saiddriving member, manually operated lever, an arm interposed between saidlever and said tripper slide adapted when moved by said lever to movesaid slide out of engagement with said locking dog, whereby said drivingmember and said driven member will be locked together to start saidmachine in operation, and means to disengage said arm from said lever atthe end of a predetermined plurality of rotations of said shaft, wherebysaid tripper slide will automatically engage said locking dog anddisconnect said driving member from said driven member and stop saidmachine.

4, A stop mechanism having, in combination, a rotary shaft, a clutchpulley rotatably mountec thereon and constituting a driving; member, adriven member fast to saic shaft, a locking dog pivoted to said drivenmember and adapted to engage said driving member and thereby lock saiddriving member and said driven member together, a tripper slide, atreadle mechanism, a member interposed between said tripper slide andsaid treadle mechanism adapted to engage said tripper slide to movesaid. slide out of engagement with said locking dos; and thereby allowsaid driving member and driven member to be locked together by said dog;and mechanism adapted to automatically disengage said tripper slide fromlllll determined plurality of rotations of said shaft, whereby saiddriving member and id driven member may be disengaged one KlOll-l theother and said machine stopped.

5. A stop mechanism having, in combina tion, a shaft, a clutchcomprising a pulley rotatably mounted upon said shaft and constituting adriving member, a driven member fast to said shaft, means for connectingsaid driving member and said driven memher together, means to disconnectsaid driving member and driven member and mechanism for autoi'naticallycontrolling said disconnecting means to cause stopping of said machineafter a predetermined number of rotations of said shaft, said mechanismincluding a vertical stud, a ratchet fast to said stud, a latch looselymounted upon said stud, a lever pivoted upon said stud, a pawl mountedupon said lever and adapted to ARTHUR R. HAVENER.

Witnesses:

CHARLES S. Goonme, FRANKLIN E. Low.

